Mode of packing eotary engines



STATES PATENT OFFC.

JNO. D. AKIN, OF COLUMBUS, PENNSYLVANIA.

MODE OF PACKING ROTARY ENGINES.

Speccaton of Letters Patent N0. 1,519, dated March 19, 1840.

To all whom t may concern.'

Be it known that I, JOI-IN D. ARIN, of Columbus, in the county of Warrenand State of Pennsylvania, have invented a new and useful Improvement inthe Rotary Steam-Engine, which is described as follows, reference beinghad to the annexed drawings of the same, making part of thisspecification.

The nature of my invention consists in so constructiong the packing asto render the engine steam tight.

To enable others skilled in t-he art of making engines to make and usemy said irnprovement, I will proceed to describe its construction andoperation.

Figure l is a side elevation of the engine. Fig. 2 is a section ofditto. Fig. 3, section showing the steam tubes. Fig. 4 one of the valvesand metallic sliding packing. Fig. 5 steam cylinder head and metallicpacking plates and the screws for moving the same. Fig. G perspectiveview of the steam cylinder head. Fig. 7 perspective view of the packingplates. Fig. 8 curved follower for pressing the hemp packing upon theanges of the wheel.

Similar letters in the figures refer to similar parts.

The steam chamber A, the revolving steam wheel B, the stationary guidewheel C, and the steam tubes D are made like those in other engines ofthis character.

WV W represent the escape tubes. The parts improved are the steamchamber head and the sliding valves.

The steam chamber head E is constructed in the following manner. Itconsists of a rectangular block of metal grooved on the side toward thesteam wheel as seen at g in Fig. 6, g being the groove, in which grooveis placed a halved metallic packing, or a packing made in two parts P P,each part made exactly alike, with a shoulder or projection p in whichis formed a semiconical countersi'nk z', which comes opposite a similarcountersink; in th-e end of the other half of the packing so that whenthe parts ofthe part and forces th-e two parts of the packing to slideover each other, one part to the right and the other part to the left,crowding the ends on which the shoulders are formed against the sides ofthe steam chamber, thus rendering the joints perfectly steam tight,while the packing, owing to the conical shape of the screw, has asimultaneous movement outward or toward the steam wheel against which itis crowded, thus rendering the joints betw-een the steam wheel and steamhead perfectly tight.

There are two countersinks and two screws to each pair of packingplates, and as both are formed alike, it will be only necessary todescribe one of them; they are both operated in the same manner and actsimultaneously causing the packing to move in three directions at thesame timenamely to the right, left, and toward the cylinder.

The valves V are all packed in a similar manner to that above described.

What I claim as my invention, and desire to secure by Letters Patent,consists in-V The before described mode of packing the steam head andsliding valves of the rotary steam engine by means of the counter-sunkhalved plates and conical screws arranged and operating in the mannerherein set forth.

- JOHN D. AKIN. TWitnesses:

WM. P. ELLIOT, EDMUND MA1-IER.

